Silica gel desiccant is a kind of physical adsorption desiccant rather than chemical reaction moisture absorption desiccant, and silica gel is a desiccant raw material approved by FDA that can directly contact with food and drugs. Compared with other desiccants, silica gel desiccant is more suitable for moisture-proof food. In addition to the above factors, silica gel desiccant also has strong moisture absorption capacity and strong adsorption performance. If all silica gel desiccant is soaked in water, it will not melt. It has the characteristics of, tasteless, corrosion-free and pollution-free, and will not be absorbed by the human body even if eaten by mistake.
1. Silica gel desiccant is insoluble in water and solvent.
Tasteless, stable chemical properties, no reaction with substances except strong alkali and hydrofluoric acid. Various types of silica gel form different microporous structures due to different manufacturing methods. The chemical structure and physical structure of silica gel determine that it has many characteristics that are difficult to be replaced by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength and so on.
2. Performance of silica gel desiccant
Silica gel desiccant is mainly composed of silica, which has stable chemical properties and does not burn. Silica gel is a kind of amorphous silica. The dust content in the workshop shall be controlled to be no more than 10 mg / m3. It is necessary to strengthen ventilation and wear a mask during operation. Silica gel has strong adsorption capacity and can dry human skin. Therefore, wear work clothes during operation. If silica gel enters your eyes, rinse with plenty of water and see a doctor as soon as possible.
3. Storage and packaging
Silica gel desiccant has strong moisture absorption capacity, so it should be stored in a dry place. There should be a shelf between the package and the ground. The packages include steel drums, paper drums, cartons, plastic bottles, polyethylene plastic composite bags, flexible container bags, etc. For the specific packaging specifications of silica gel desiccant, see the product description of Dingxing classification. Rain, moisture and exposure to the sun shall be avoided during transportation.
At present, Yiming produces fine porous silica gel, blue silica gel, orange silica gel, variable pressure absorption silica gel etc as silica gel desiccants.